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https://github.com/koajs/ratelimit
Rate limiter middleware
https://github.com/koajs/ratelimit
Last synced: 3 months ago
JSON representation
Rate limiter middleware
- Host: GitHub
- URL: https://github.com/koajs/ratelimit
- Owner: koajs
- License: mit
- Created: 2013-11-13T21:23:46.000Z (over 10 years ago)
- Default Branch: master
- Last Pushed: 2024-01-29T14:49:47.000Z (5 months ago)
- Last Synced: 2024-03-21T19:07:46.181Z (3 months ago)
- Language: JavaScript
- Size: 70.3 KB
- Stars: 478
- Watchers: 8
- Forks: 57
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- Changelog: History.md
- License: LICENSE
Lists
- awesome-koa - ratelimit - Rate limiter middleware (Middleware)
- awesome-nodejs-rest-api - koa-ratelimit
- awesome-koa - koa-ratelimit - 限流中间件。   (仓库 / 中间件)
README
# koa-ratelimit
[![NPM version][npm-image]][npm-url]
[![build status][travis-image]][travis-url]
[![node version][node-image]][node-url]
Rate limiter middleware for koa.
## Installation
```bash
# npm
$ npm install koa-ratelimit
# yarn
$ yarn add koa-ratelimit
```
## Example
### With a Redis driver
```js
const Koa = require('koa');
const ratelimit = require('koa-ratelimit');
const Redis = require('ioredis');
const app = new Koa();
// apply rate limit
app.use(ratelimit({
driver: 'redis',
db: new Redis(),
duration: 60000,
errorMessage: 'Sometimes You Just Have to Slow Down.',
id: (ctx) => ctx.ip,
headers: {
remaining: 'Rate-Limit-Remaining',
reset: 'Rate-Limit-Reset',
total: 'Rate-Limit-Total'
},
max: 100,
disableHeader: false,
whitelist: (ctx) => {
// some logic that returns a boolean
},
blacklist: (ctx) => {
// some logic that returns a boolean
}
}));
// response middleware
app.use(async (ctx) => {
ctx.body = 'Stuff!';
});
// run server
app.listen(
3000,
() => console.log('listening on port 3000')
);
```
### With a memory driver
```js
const Koa = require('koa');
const ratelimit = require('koa-ratelimit');
const app = new Koa();
// apply rate limit
const db = new Map();
app.use(ratelimit({
driver: 'memory',
db: db,
duration: 60000,
errorMessage: 'Sometimes You Just Have to Slow Down.',
id: (ctx) => ctx.ip,
headers: {
remaining: 'Rate-Limit-Remaining',
reset: 'Rate-Limit-Reset',
total: 'Rate-Limit-Total'
},
max: 100,
disableHeader: false,
whitelist: (ctx) => {
// some logic that returns a boolean
},
blacklist: (ctx) => {
// some logic that returns a boolean
}
}));
// response middleware
app.use(async (ctx) => {
ctx.body = 'Stuff!';
});
// run server
app.listen(
3000,
() => console.log('listening on port 3000')
);
```
## Options
- `driver` memory or redis [redis]
- `db` redis connection instance or Map instance (memory)
- `duration` of limit in milliseconds [3600000]
- `errorMessage` custom error message
- `id` id to compare requests [ip]
- `namespace` prefix for storage driver key name [limit]
- `headers` custom header names
- `max` max requests within `duration` [2500]
- `disableHeader` set whether send the `remaining, reset, total` headers [false]
- `remaining` remaining number of requests [`'X-RateLimit-Remaining'`]
- `reset` reset timestamp [`'X-RateLimit-Reset'`]
- `total` total number of requests [`'X-RateLimit-Limit'`]
- `whitelist` if function returns true, middleware exits before limiting
- `blacklist` if function returns true, `403` error is thrown
- `throw` call ctx.throw if true
## Responses
Example 200 with header fields:
```
HTTP/1.1 200 OK
X-Powered-By: koa
X-RateLimit-Limit: 100
X-RateLimit-Remaining: 99
X-RateLimit-Reset: 1384377793
Content-Type: text/plain; charset=utf-8
Content-Length: 6
Date: Wed, 13 Nov 2013 21:22:13 GMT
Connection: keep-alive
Stuff!
```
Example 429 response:
```
HTTP/1.1 429 Too Many Requests
X-Powered-By: koa
X-RateLimit-Limit: 100
X-RateLimit-Remaining: 0
X-RateLimit-Reset: 1384377716
Content-Type: text/plain; charset=utf-8
Content-Length: 39
Retry-After: 7
Date: Wed, 13 Nov 2013 21:21:48 GMT
Connection: keep-alive
Rate limit exceeded, retry in 8 seconds
```
## License
[MIT](LICENSE)
##
[npm-image]: https://img.shields.io/npm/v/koa-ratelimit.svg?style=flat-square
[npm-url]: https://npmjs.org/package/koa-ratelimit
[travis-image]: https://img.shields.io/travis/koajs/ratelimit.svg?style=flat-square
[travis-url]: https://travis-ci.org/koajs/ratelimit
[node-image]: https://img.shields.io/badge/node.js-%3E=_10-green.svg?style=flat-square
[node-url]: http://nodejs.org/download/